Stable aqueous anti-dandruff shampoo containing captan

Claim 1

A stable aqueous anti-dandruff shampoo formulation consisting essentially of water, and about 0.1 percent to about 5 percent by weight of N-trichloromethylthio-4-cyclohexene-1,2-dicarboximide as the anti-dandruff agent, said formulation having a pH in the approximate range of from 4.5 to 6.5, and from about 10 percent to about 90 percent of a detergent, said detergent being selected from the group consisting of an anionic detergent, a nonionic detergent and mixtures thereof, wherein said anionic detergent is selected from the group consisting of an alkali metal alkyl sulfate having from 12 to 26 carbons, an alkali metal alkyl sulfonate having from 12 to 26 carbons, an alkali metal salt of an N-fatty acyl acid amide of taurine whose acyl group contains from 12 to 18 carbons and whose amino group may be substituted by methyl, an alkali metal salt of a fatty acyl acid ester of isethionic acid whose acyl group contains from 12 to 18 carbons, an alkali metal alkyl benzene sulfonate having eight to 22 carbons in the alkyl group thereof, an alkali metal sulfonate of an ethylene oxide adduct of an alkylphenol having eight to 20 carbons in the alkyl group thereof and from six to 100 ethylene oxide units, and mixtures thereof; and said nonionic detergent is selected from the group consisting of an ethylene oxide adduct of a long chain aliphatic alcohol containing from about 12 to about 26 carbons or an alkylphenol having eight to 20 carbons in the alkyl group thereof, said adduct containing from six to 100 ethylene oxide units and being free of amino nitrogen, an ethylene oxide-propylene oxide condensate composed of a polyoxypropylene hydrophobic portion having a molecular weight from 950 to 3,250, having from 10 to 80 weight percent ethylene oxide units and being free of amino nitrogen, and mixtures thereof.